Reportedly, 100 each of the Model 1842 muskets, Model 1841 "Mississippi" rifles, and Model 1847 cavalry musketoons were converted using James H. Merrill's breech loading system c. 1861-1862. These Merrill breech loading alterations of the Model 1842 muskets are described on pages 201-203 of George D. Moller's book "American Military Shoulder Arms Volume III", with this exact rifle photographed on pages 201 and 203. The alteration was performed by replacing the barrel tang with the Merrill breech system as well as adding the lever catch to the barrel, adding an additional screw in the lock plate for added strength, installing a clean out screw on the bolster, and the barrel was also rifled and fitted with a long range rear sight as part of the conversion. This rare Merrill alteration is not to be confused with the much more common Merrill manufactured carbines and rifles also used by the Union during the war effort. The front sight is an integral blade on the front barrel band. A stud on the bottom at the muzzle is used for socket bayonet mounting. The barrel is marked with "PB/P" and "V/P/eagle head" on the left near the breech. The lock plate is dated 1853 and has the standard markings. The breech mechanism is marked with the Merrill address and patent information in three lines. Fitted with a smooth straight grip stock secured by three sets of barrel bands, sling swivels on the middle band and front of the trigger guard, and a trumpet head ramrod. Marked with a circled script "JAS" (John A. Schaeffer) inspection cartouche on the left stock flat. Includes a US socket bayonet, leather sling, and wood tampion. Provenance: The George Moller Collection

Very good, bright surfaces with scattered light pitting. Stock is fine with defined edges and scattered scratches and dents. Mechanically excellent. Included bayonet is excellent. A rare example of a Merrill altered U.S. Harpers Ferry Model 1842 rifled musket!